attenuated vaccine

https://doi.org/10.1351/goldbook.12911
Vaccine made from a live organism that targets cells of the immune system but has been engineered or weakened so as not to cause disease.
Source:
PAC, 2012, 84, 1113. (IUPAC glossary of terms used in immunotoxicology (IUPAC Recommendations 2012)) on page 1129 [Terms] [Paper]